I know that Neutral & Pinkshit already discovered this (they used it as the 'win' cutscene for the racing mode they created as part of Mafia Classic Mod Deluxe), but I haven't found it anywhere in isolation, so I loaded it into a mission and recorded it for all to see.
One thing that's worth noting is that the three winners loaded in by the .diff file disappear when the .rec file is loaded (I put them back in manually). I assume this is because they are placeholders that would then be replaced with whoever came 1st, 2nd & 3rd in a specific race.
Looking in the hex there were also a number of sounds that had their filenames deliberately altered so the game wouldn't find them to play, but any attempt to restore them seems to produce a crash. Additionally, I assume the ground is missing either because the cutscene was meant to be transplanted into one of several locations (depending on which circuit was selected), or because it requirs a model/scene.4ds that was completely removed from the game.

Below is the cutscene in question, along with the loading screens that originally accompanied each circuit. If you look to the left of a couple of the images, you can see the edge of the raw screenshot they took with the edge of the filter they put over it!

I have attached ground to this cutscene, but can't make the cup to show up. If it is not you who made it which mod do you use?

Edit: Ah it should be Classic Delux mod than.

Edit edit: It isn't a mod, it's a cutscene that was hidden in the game files.

As for your problem, you can attach objects via the command human_linktohand or by using MWE to move the object into the hand and making the hand the object's parent (e.g. Tommy.r_hand)._________________

I think I should've stated it more clearly. I've converted these 2 races from PS2 to PC version. It has been played on PC.

I've changed that blue fog, created more detailed lightmaps and found out how to make npc more difficult to beat - race has to be started from racing menu in main menu with highest difficulty setting instead of mission load from other mission .

Is this a mod with an actual release? I ask because in this thread
http://mafiascene.com/forum/viewtopic.php?t=10237
Duelist is saying to install your mod first, then his. But I'm not seeing any download link and I'm unsure if this even is a mod or not.
Can you please clarify, thank you!